Grinding-machine.



No. 879,277. PATNTED FEB. 18, 1908.

A. B. LANDIS. GRINDING MACHINE.

APPLICATION FILED JULY 5, 1906l 3 SHEBTS-SHEET 1.

No. 879,277. PATENTED PEB. 18, 1908.

- A. B. LANDIS.

GRINDING MACHINE.

APPLICATION FILED JULY 5, 1906. 3 SHEETS-SHEET 2.

Innen/tow www @Wm/weg- No. 879,277. PATENTED FEB. 18, 1908. A. B. LANDIS.

GRINDING MACHINE.

APPLICATION FILED JULY 5, 1906.

3 SHEETS-SHEET 3.

@LVMH @com Lux/zw @585 n 78. w 89%- W@ ABRAHAM B.' LANDIS, OF WAYNESBORO, PENNSYLVANIA.

GBINDING-MACHINE.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed .Tuly 5. 1906. Serial No. 324.858.

To. all whom it may concern.'

Be it known that I, ABRAHAM B. LANDIs, a citizen of the United States, residing at faynesborm in the county of Franklin and State ot Pennsylvania, have invented certain new and useful Improvements in Grinding'- Machines, of which the following is a specification. Y

The object of my said invention is to provide aigrinding machine especially adapted for grinding -the interior surfaces of cylindrical arts held or supported in a vertical position, the invention consisting in the particular construction and arrangement of arts whereby such a machine is rovided or such a use, all as will be hereina ter more fully described and claimed,

Referring to the vaccompanying. drawings which are made a art hereof and on which similar reference cliaracters indicate similar parts, Figure \1 is a to or planl view of a grinding machine embo ying my said invention, Fig.,2 a side elevation `of the same as seen when looking in the direction indicated by the arrows from the dotted line 2-2 in Fig. 3, Fig. 3 a front elevation of said machine with portions shown yin section and partici` the casing broken away toV illustrate the construction more clearly, and Fig. 4 a fragmentary detail of the clutch forming part' of the reversing mechanism.

1n said drawings the portions marked Av represent the main supporting frame of the machine, B the work-supporting table, and C the grinding wheel carriage.

Themain supporting frame A is a casting of suitable size and shape to support the different parts of the mechanism employed.

. It is of considerable height as shown, made necessary by the characternof the machine, as will be resently described.

The worliesupporting table B is of a disk formation and mounted upona hollow s in- `dle B journaled in a bearing B2 on the si e of frame A. 1t is provided on its under side with a bevel gear Wheel b .w'ith whicha similar ear b on a drivin shaft b2 en ages. Said tab e is provided wit a rim b3 or catching the water used in the grinding operation.l

The top surface of said table'has-grooves?)4 which areinclined toward its center, leading to a central aperture through the hollow spindle B and provides a discharge for the water into a tank B a located beneath the lower end of said spindle, as shown. Clamping devices B4 for holding the work W are adjustably mounted in the radial grooves b4 in the to of said table B and are thus adapted to ho d work of any size desired.

The grinding wheel carriage C is a casting of suitable form to carry the' mechanism mounted thereon and is mounted upon a projec'ting rib a on the side of the frame A, by means of dove-tailed shaped ilan es c which iit over correspondingly sha ed e ges of said rib. It is counter-balance by a weight C connected thereto by a cable c. attached to said weight at one end and its other end ism carried thereby is thus rendered comparatively easy. A lug CB is cast on the inside 'face of said carriage near its lower end and projects through a vertical way in the ad- ]acent side of theframa It is internall screw-threaded and a screw-threaded sha t A3 mounted in suitable bearings a? and a* on the inside of said frame, passes throu h said lug with its threads enga ing the t reads thereof. By this means t e travel of said carriage is provided for as will be presently morefully described. The grinding wheel C4 is mounted upon a spindle cf journaled-in suitable bearings c5 in a slider C5 mounted to slide on atransverse way on the front face of carriage 'C. Said slider C5 is provided lwith a lug c8 internally screw-threaded with which a screwthreaded rod Cu engages.I

Said screw-threaded rod C has a crank-or hand-wheel c" on its outer end by which it may be turned and said slider adjusted to feed the grinding wheel to the work. A rack c1" is mounted on the top of said slider and a inion c15 on shaft c3 meshes therewith. It wi thus be seen that as the weight C through the cable c pulls upwardly it operates through the pulle cl and the rack and pinion connection to hold the slider and grinding wheel away from the work, serving to take up all back-lash and prevent the grinding wheel from being jarred into thel work to mar it, thus insuring a smooth and even operationv of the machine. A pulley C" is mounted onthe grindin wheel spindlel c4 by which the power is app ied for driving said grinding wheel. y.

A powerl shaft' 1 is journaled in suitable bearingson one side of the frame and provided with a cone-pulley 2 from which a belt 3 runs to la cone-pulley 4 on a counter-shaft 5, which is mounted in suitable bearings and extends across the frame of the machine. A pulley 6 is mounted alongside said pulley 4 and is connected by a belt 7 with a pulley 8 on the outer end of a shaftl 9 journaled on the top of the machine. The opposite end of said shaft 9 has a ulley 10 from which a belt 11 runs to the pullpey C7 on the grindin wheel spindle c4, passing over an idler pu ley 12 on a shaft 13 mounted in bearings Von the back of the machine at a point below the pulley C7 and passing between idler pulleys 14 and 15 on horizontal shafts 16 and 17 mounted on a bracket carried bythe carriage C. Said belt 11 passes through between said idlers 14 and 15 and is lven .a

vhalf twist and passes over said pu eyCl.

By this arrangement said belt 11. maintains its normal tension'and position regardless of the vertical movement of the carriage and does not interfere with said movement. A pinion 18 is also mounted upon power shaft land meshes with a gear wheel 19 on the transverse driving shaft b2 which has the pinion b on its opposite end and operates to drive the work supporting table B. An-- other pulley 20 is mounted on said shaft b2 and is connected by a belt 21 with a pulley 22 on a short shaft 23 mounted in suitable bearings in the frame. Said shaft 23 has a pulley 24 connected by a belt 25 with Va pulley 26 on a transverse shaft 27, which as two pinions 28 and 29 mounted thereon.

Pinion 28 meshes with a loosely mounted gear wheel 31 on shaft 32 mounted in suitable .bearings ad'acent to and parallel with said shaft 27. inion 29 me'shes with a pinion 28a on a parallel shaft 27a, which has a pinion 30, which meshes with the loosely mounted LK ear wheel 36 on shaft 32. Said gear whee with a clutch part on their respective hubs and either may be coupled to the shaft 32 b'v a l`sliding ldouble-faced clutch part 33, which is mounted between them on said shaft by-means of a spline. Said clutch art 33 is operated by means of a shifting for 36 mounted on a pivot 37 and connected by a link 43 to an operatin lever 42 mounted on a ivot 44. Said sha 32 is provided with a evel gear 40 which meshes with a bevel gear 41 on the upper end of shaft A3, which thusserves to drive said shaft and traverse the carriage C up and down on the bed A,

the clutch art 33 being shifted from one of the gear W eels 30 or 31 to the other, to re- .ed to slide vertica s 30 and 31 are each provided' the work, as will be readily understood. A

spring mounted block 48 in a casing 49 on e side of the frame is ada ted to bear against the lower end of the sh' ting lever-36. Its upper end is concaved so'- as to hold said lever in a vertical position a's shown in Fig.V 3, in which position both clutch parts are out of engagement. When thrown in one direction or the other the lower end of said lever I,

will pass over one or the other of the corners of said spring block, which will thus hold said shifting leverv in position to hold the clutch part in engagement until forcibly released. A lever 38 mounted on a pivot 39 carries a lug or roller onits upper end which engages with a T-shaped slotin the end of an angle arm 36a of shifting-fork 36 and 1s adapted to lock the parts in xed position when desired.

Ino eration, the work bein secured on the ta le B by means of a camp B* the mechanism is adjusted as indicated most plainly in Fig. 3, the stops 46 and 47 being arranged to automatically shift the direction of travel of carriage C to suit the length of the work vbeing ground. The' slider C5 is operated by means of the hand wheel-c7 to feed the grinding wheel to the work as be fore described, and the operation proceeds as fully hereinbefore explained.

Having thus fully described my said mvention, what I 'claim as new 'and desire to secure by Letters Patent, is 1. A grinding wheel comprising a supporting frame havmg a vertical way or track thereon, a grinding wheel vcarriage mountly on said way or track, a slider on said grinding wheel carriage mounted to slide transversely thereof, a grinding wheel spindle mounted in bearings on said slider, a rotary table for supporting the Work, and the various operating mechanisms, substantially as set forth.

2. In a grinding machine, the combination` of the supporting frame, the grinding wheel carriage mounted to slide vertically on said frame, means for traversing said carriage up and down, the slider mounted on said carriage to slide transversely thereof, "means for sliding said slider, the grinding wheel spindle mounted in bearings on said slider, the grindmg wheel on said s indle, means for driving the same,v the wor supporting table, and

means for rotating said as set forth. y

3. In a grinding machine, the combination, of the supporting frame, the grinding wheel carriage mounted to slide vertically`on one side of said frame, the slider mounted to slide transversely on said vcarria e, the grindin wheel spindle journaled in earings on sai slider, the rinding-wheel on said spindle, and means or traversing said carriage,` adjusting said slider and driving said grinding- Wheel, substantially as set forth.

4. In a grinding machine, the'combination, of thesupporting frame, the grinding wheel carriage mounted to slide vertically on one side of said frame, traversing mechanisms for said carriage, the slider mounted to slide transversely on said carriage,'means for adjusting said slider, the grinding wheel carried by said slider, means for driving said grinding wheel, the work support, and means for rotating said work support, substantially as set forth.

table, substantially 5. In a grinding machine, the combination,

of the supportingframe, the work-holding table mounted on a hollow-spindle in bearings on one side of said frame, the top of said table having slots inclined toward its center and having a perforation leadin to the hol,- low spindle, a gear on said tab e, a driving shaft having a gear meshing with said gear, work holding clamps on the top of said table,

the carriage, the mechanism for traversing said carriage up and down, the slider, means for sliding said slider transversely, the grinding-wheel on said slider, and means for driving said grinding wheel, substantially as set forth.

6. In a grinding machine, the combination, of the sup orting frame, the rotary work holding tabile mounted on a spindle in bearings on one side of said frame, means for ro'- tating the same, the grinding-wheel carriage mounted to slide up and down on a way on one side of. said frame, a balancin weight connected to said carriage, means or traversing said carriage upland down, the slider on said carriage, the grinding wheel journaled in bearings on said slider, and means, for driving said grinding` wheel, substantially as set forth. y

7. In a grinding machine, the combination,

of the supporting frame, the work-support, ing table, the vertically adjustable carriager mounted on said frame above said table and connected to a counter-balance, traversing' mechanism, means for reversing the motion of said traversing mechanism, the slider on said carriage, the grinding wheel on a s indle journaled in bearings'on said slider, an driv ing mechanism connected therewith, substantially as set forth.

8. In a grinding machine," the combination,.ofthe sup orting frame, the Work support on one sidb, the carriage mounted to slide vertically on one side of said frame above said work support, gearing connected therewith for traversing `said carriage, reversing mechanism, means for automatically o rating said reversing mechanism, the s ider, the grinding wheel thereon, andthe operating-mechanism, substantially as set forth.

9. In a grinding machine, ythe combination, of the su porting frame, the Work support, the grin ing wheel carriage, mounted to slide vertically on said frame, the traversing mechanism for said carriage comprising' a screw rod mounted in bearings on the frame and engagin with a nut part on the carriage, gearing for riving said screw-rod, reversing mechanism, and adjustable trips carried by said carriage in position to strike and o erate said reversing mechanism, substantia ly as set forth.

10. In a grinding-machine, the combination, of a frame having. a vertical guide-Way, a carriage mounted to reciprocate thereon, a weight or` counter-balancing said carriage, a slidenon said carriage carrying the rinding Wheel, and afconnection between sai weight and said slider for holding the' grinding wheel away from the work, substantially as set forth. f

11. In a grinding machine, the combination, of the frame having a vertical guideway, the carriage mounted to reciprocate thereon, the slider on said carriage, the grinding wheel on said slider, and a counterbalancing wei ht connected to said carriage and to said slider to hold it away from the Work, substantially as set forth.

12. In a grinding machine, the combination, of the frame having a vertical guide- Way, the work holding table, the carriage mounted to reci rocate on said vertical guide-way, the sli er on said carriage having the grinding wheel mounted' thereon, a weight and connectionsbetween said weight and said carriage and said slider, whereby said carriage is `balanced and said slider is held away from the work, substantially as set forth.. V u

13. In a ginding machine, the combina-` tion, of the ame, a vertically reciprocating carriage thereon, a slider on said carriage carrying the grinding wheel, and a weiglit connected to balance said carriage-and cause a thrust in onehdirection upon said slider, substantiallyas set forth.

14. In a grinding machine, the combination, of the frame, the vertically reciprocating carriage, the slider thereon carrying the grinding wheel, arack on said slider, a pinion mounted on a shaft journaled in bearings on said carriage andengaging said rack, a pulley on said pinion-shaft, a Wei ht for counterhand and seal at Waynesboro, Pennsylvania, I balancing said carriage, an a flexible conthis 7th day of June, A. D, 1906.v

nection attached to saidy Weight at one end and to saidpulley at the other and running ABRAHAM B LANDIS' [L Sl 5 over an intermediate ulley on the frame, Witnesses:

substantially as set fort J. L. LEMMON,

In Witness whereof I have hereunto set my ALF. N. RUSSELL. 

